Forced lubrication.



IVI. BIRKIGT.

FORCED LUBRICATION.

APPLICATION FILED IAN.4, I9Ie.

1,24L332, PatentedSept. '25, 1917.

2 SHEETS-SHEET l.

IVI. BIRKIGT.

FORCED LUBRICATION.

APPLICATION FILED IAII.4, Isle.

MARC BIRKIGT, OF BOIS-COLOMBES, FRANCE.

FORCED LUBRICATION.

Specification of Letters Patent.

Patented Sept. 25, 1911"?.

' Application filed January 4, 1916. Serial No. 70,255.

T all whom t may concern:

Be it known that I, MARC BIRKIGT, engineer, a citizen of the Republic ofSwitzerland, residing at Bois-Colombes, Department of Seine, France,have invented certain new and useful Improvements in Forced Lubrication,of which the following is a specification.

This invention relates to forced lubrica-` tion for machines,particularly for explosion engines, in which the lubricant passes fordrivin from fixed bearings into a central lconduit provided in a shaftrotating in the said bearings. f

This invention has for its object to enable arrangements of forcedlubrication to be designed so as to simplify their construction and atthe same time render their working more satisfactory than hitherto.

The invention comprises an arrangement of forced lubrication in whichthe passage of the lubricant from each bearing into the centrall conduittakes place a large number of times foreach revolution of the shaft.

The invention further comprises other Iarrangements vmore fullydescribed herein-v after.

In the accompanying drawing which shows an explosion engine providedwith forced lubrication according to this invention; Y

Figure 1 v-is a vertical section and Fig. 2 is a section on the line2-2' of Fig. l, on a larger scale.

Fig. 3 is a similarview showing' a modification of the oil passages ofFig. 2. I

The explosion `engine is fitted with a crank shaft a and with a camshaft b mounted above the cover of the cylinders, directly the inlet andexhaust valves of t e said engine.

At the bottom portion of the crank ease of the engine, there isarranged, within apsuitable compartment 0*, a rotary lubricating pum c,having an inlet or suction pipe d?, whie draws up the lubricant from thebottom of the said crank case, and also having an exhaust pipe e throughwhich the lubricant is forced from the pump under pressure. The outletfrom the latter pipe communicates with a screen or filter c and thelubricant is forced through this filter and into a horizontal pipev e',which delivers it into a series of conduits c2, said conduitsterminating in the interior Iof the bearings a. of the crank shaft a. Inthe bearing bushing a2 of each bearing a', there is made a series ofperforations a2", (Fig. 2), which are preferably arranged at equalangular distances apart, and are adapted to successively register,during each revolution of the crank shaft, with a single radial passagea3, formed in said crank shaft; the inner end of this passage 0,3opening into an axial conduit a". The perforations a2 in each bushing a2lie in a common plane; in which the passage 0,3 also lies, as will beunderstood. However, the arrangement just described, while preferred,may be reversed, invwhich case there will be a single perforation a20 inthe bushing a2, and a series of radial passages a3 in the crank shaft,as represented in Fig. 3.

Owing to this, the circulation of lubricant no longer takes place injerks as hitherto but in a practically continuous manner, which enablesa very great pressure to be given to the lubricant, without producingany excessive losses of load rendering the strong pressure useless. 4

The valve gear is arranged as usual, the lubricant being suppliedthrough the conduit a to the bearings of the connecting rod heads and toother parts to be lubricated. Moreover the lubricant can be sentdirectly through a conduit d from one of the bearings a1 of the crankshaft to one of the bearings b1 of the cam shaft b, whence it passesthrough means similar to those described for the crank shaft, into acentral conduit b of the said cam shaft which supplies it to the otherbearings 0f the said shaft, as well as to other parts of the valve gearwhich it is desired to lubricate. t

Obviously, the invention is not limited to the arrangements described,but comprises any modifications within. the scope of the claims.

Having now described and ascertained the nature of my said invention andin what manner the same is to be performed, I de- `clare that what Iclaim is 1. In a lubricating system, the combination of a shaft having acentral conduit; a bearing lfor said' shaft; and means for supplyinglubricant to said bearing, said shaft and said bearing constituting apair of companion parts in port vcommunication with the conduit in saidshaft, one of such parts having a radial port, and the other part havinga plurality of radial ports adapted to `successively register with thefirst-named port, whereby the lubricant supplied to said bearing maypass from the latter to said shaft a predetermined number of times foreach revolution of the shaft.

2. In a lubricating system, a shaft having a central conduit and apassage radially eX- tending from the conduit to the periphery of theshaft, bearing bushings for the shaft provided with a plurality ofopenings, the axes of said openings beingin one and the same plane Withrelation to the shaft, said passage in the shaft being adapted toconsecutively register with said openings, whereby a lubricant may passfrom the exterior of said bushing to the conduit in said shaft, apredetermined number of times for each revolution of the shaft.

3. In a lubricating system, the combination of a crank shaft,a'plurality of bearings for said shaft, said shaft having a centralconduit and said bearings having a passage, a conduit connected withsaid passages in the bearings for distributing lubricant to the latter,means for forcing the lubricant through said conduit, and bushingsinterposed between each bearing and shaft each having a plurality ofopenings therein communicating with the passage of the bearing, saidshaft having passages extending from the periphery thereof to theconduit therein and adapted to consecutively register with openings ofthe bushings whereby the lubricant may pass a predetermined number oftimes for each revolution of the shaft from said passages of thebearings to the conduit of said shaft.

In testimony whereof I have hereunto set my hand in presence of twosubscribing CHAS. I. PREssLY, PAUL BLUM.

